Source
r/prusa•
AutoBrew

How can I get my bed flatter?

I've done the nyloc mod and I'm using the 7x7. Prints are coming out good, but I see others here are getting .005mm tolerances... What is causing my bed to have these waves between the screws?

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g81:

Recv:   0.14950  0.12750  0.11900  0.14750  0.09850  0.10650  0.12700
Recv:   0.17250  0.21400  0.18350  0.15750  0.16600  0.17050  0.14400
Recv:   0.16150  0.22350  0.21250  0.17313  0.18000  0.20100  0.14400
Recv:   0.13550  0.17600  0.15750  0.14250  0.17863  0.17550  0.14500
Recv:   0.15150  0.21650  0.20550  0.18475  0.21650  0.21850  0.16000
Recv:   0.15700  0.20100  0.20350  0.17450  0.20100  0.19650  0.14400
Recv:   0.14850  0.15550  0.15500  0.14200  0.13700  0.13300  0.14550

Output from https://github.com/pcboy/g81\_relative :

      Raw values:
      0.01	0.01	-0.02
      -0.01	0	0.0
      0.01	-0.0	0.0

      Degrees:
      7°CW	7°CW	14°CCW
      7°CCW	0	0°CCW
      7°CW	0°CCW	0°CCW

      Fractional Turns:
      0CCW	0CCW	0CCW
      0CCW	0	0CCW
      0CCW	0CCW	0CCW

​

https://i.redd.it/fi4u4rhex3y21.png

Posted May 14, 2019, 4:48 AM UTC

23
Kolomanschell•

Ask yo mama to lay on it.

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^(i am sorry... my first and last yo mama joke.)

2†
bivaterl•

I have heard that you should nylock adjust using the 3x3 because that more accurately corresponds to the location of the screws. If that is the case, try using the 3x3 for your leveling and then check it using 7x7 after you think you've got it down.

Good luck - I just got some gold nylocks from amazon and am going to try this when I can let the printer sit for a bit (and I can get my RPi working again).

2
cyberterd•

on the 7x7 you will not get much better than .1 I have gotten as low as .085 but it was really because I had nothing better to do for 3 hours and it was maddening.

1